Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0df879fd6765d0c…

MALICIOUS

PDF

44.2 KB Created: 2018-11-14 11:22:43 +03:00 Authoring application: Acrobat PDFMaker 10.1 для Word (via Adobe PDF Library 10.0)
MD5: ea146cfd508fd3b783d30e9a368ecac4 SHA-1: d7a67840e2535b56f8f3b17af9760e22dffaceaf SHA-256: c0df879fd6765d0c7127bd1127cab8ebdd33d19a5dd42edc30470d6b5053e400
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a machine learning classifier and contains a significant number of embedded links to external PDF files hosted on 'gorillawalker.com'. This behavior is indicative of a link farm or SEO manipulation tactic, often used to distribute malicious content or improve the ranking of malicious sites. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8224

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.gorillawalker.com/strategies-for-technical-communication-in-the-workplace-2nd-edition.pdf
    • http://www.gorillawalker.com/the-inner-city-mother-goose.pdf
    • http://www.gorillawalker.com/iso-22478-2006-water-quality-determination-of-certain-explosives-and.pdf
    • http://www.gorillawalker.com/glencoe-world-history-reading-essentials-and-note-taking-guide.pdf
    • http://www.gorillawalker.com/botswana-labor-laws-and-regulations-handbook-strategic-information-and-basic.pdf
    • http://www.gorillawalker.com/practical-workbook-for-milady-s-standard-cosmetology.pdf
    • http://www.gorillawalker.com/dysnomia-outcasts-on-a-distant-moon.pdf
    • http://www.gorillawalker.com/2013-kiss-wall-calendar.pdf
    • http://www.gorillawalker.com/collins-gem-spiders-photoguide.pdf
    • http://www.gorillawalker.com/the-string-teacher-s-cookbook-creative-recipes-for-a-successful.pdf
    • http://www.gorillawalker.com/hayate-the-combat-butler-vol-18.pdf
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    • http://www.gorillawalker.com/mary-through-the-centuries-her-place-in-the-history-of.pdf
    • http://www.gorillawalker.com/eve-kosofsky-sedgwick-routledge-critical-thinkers.pdf
    • http://www.gorillawalker.com/a-made-up-place-new-zealand-in-young-adult-fiction.pdf
    • http://www.gorillawalker.com/danke-f-r-die-lieferung-wie-das-universum-uns-immer.pdf
    • http://www.gorillawalker.com/second-book-of-practical-studies-for-saxophone.pdf
    • http://www.gorillawalker.com/maya-ruins-of-mexico-in-color.pdf
    • http://www.gorillawalker.com/warner-bros-music-presents-65-golden-hits-through-the-years.pdf
    • http://www.gorillawalker.com/usa-wholesale-sources-directory-buy-direct-at-hong-kong-prices.pdf
    • http://www.gorillawalker.com/introduction-to-the-thermodynamics-of-materials-fifth-edition.pdf
    • http://www.gorillawalker.com/super-word-finder-the-complete-reference-book-for-crosswords-blockwords.pdf
    • http://www.gorillawalker.com/entering-germany-1944-1949.pdf
    • http://www.gorillawalker.com/soothing-and-stress.pdf
    • http://www.gorillawalker.com/digital-diaries.pdf
    • http://www.gorillawalker.com/werewolves-and-wallflowers-werewolves-and-wallflowers-gay-mm-romance-series.pdf
    • http://www.gorillawalker.com/aquarium-care-of-goldfish-animal-planet-pet-care-library.pdf
    • http://www.gorillawalker.com/famous-last-words-the-american-language-crisis-reconsidered.pdf
    • http://www.gorillawalker.com/the-flame-lily-weeps.pdf
    • http://www.gorillawalker.com/exposure-assessment-for-epidemiology-and-hazard-control-industrial-hygiene-science.pdf
    • http://www.gorillawalker.com/transnational-capitalism-and-hydropolitics-in-argentina-the-yacyreta-high-dam.pdf
    • http://www.gorillawalker.com/the-professor-mcmurtrie-and-drake.pdf
    • http://www.gorillawalker.com/if-you-sailed-on-the-mayflower-in-1620.pdf
    • http://www.gorillawalker.com/california-real-estate-principles-7th-edition.pdf
    • http://www.gorillawalker.com/pilot-s-handbook-of-aeronautical-knowledge-faa-h-8083-25a.pdf
    • http://www.gorillawalker.com/riketz-outworlders-book-1-the-outworlders-kindle-edition.pdf
    • http://www.gorillawalker.com/2013-kiss-wall-calendar.p
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/

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